Roof valleys play a crucial role in protecting homes from Winnipeg’s harsh climate, where heavy snow, ice, and rain are frequent visitors. Without properly functioning roof valleys, water can infiltrate your roof deck, causing structural damage and leading to expensive repairs.
When it comes to valley roof systems (open and closed valleys), homeowners often face the choice between open valley roofs and closed valley roofs. Understanding the key differences between these two types can help you make a well-informed decision that ensures durability and efficiency for your home. This guide explores both options in detail to help you choose the best fit for your roofing project.
Understanding Roof Valleys
Definition:
A roof valley is the area where two roof slopes meet, creating a channel that directs water runoff down to the gutters. There are two types of roof valleys, open and closed valleys. Properly installed valleys prevent water infiltration and protect the roof from damage.
Key Challenges:
Winnipeg’s climate adds extra challenges to roof valleys, including:
- Water Management: Heavy rain and melting snow can accumulate in the valley center, making efficient drainage essential.
- Ice Dams: During winter, ice dams can form in the valley area, increasing the risk of water seepage and roof leaks.
For a deeper dive into roof valleys, visit our blog on Roof Valleys: The Unsung Heroes of Your Home’s Protection.
Open Valley Roof: A Detailed Look
Description:
An open valley roof features exposed metal flashing in the valley center, where water flows over the metal surface and away from the roof. This open roof valley method effectively manages water runoff and reduces the risk of debris accumulation.
Materials:
Open roof valleys typically use durable metals such as:
- Aluminum: Lightweight, resistant to corrosion, and relatively affordable.
- Copper: Highly durable with a long lifespan and a distinctive aesthetic appeal.
- Galvanized Steel: Strong and resistant to rust, making it ideal for harsh climates.
Pros:
✅ Water Efficiency: The exposed metal surface promotes efficient drainage, preventing water buildup.
✅ Durability: Metal flashing offers superior resistance to wear, rust, and corrosion.
✅ Inspection: Easier to inspect and repair because the metal valley is exposed.
Cons:
❗ Cost: Higher upfront costs for materials and installation.
❗ Maintenance: Periodic inspections are necessary to check for rust or corrosion, especially in Winnipeg’s climate.
Above All’s Expert Pro Tip:
The Insulation Manager at Above All emphasizes that an open metal valley can significantly extend the lifespan of your roofing system by preventing water buildup and ensuring efficient drainage.
Closed Valley Roof: What to Know
Description:
A closed valley roof uses overlapping shingles to cover the valley, creating a seamless appearance. Water is channeled through the shingles cover, giving the roof a more uniform and aesthetically pleasing look.
Materials:
Closed roof valleys typically use asphalt shingles to cover the valley lining, blending smoothly with the rest of the roof.
Pros:
✅ Cost-Effective: Lower material and installation costs make closed valleys a budget-friendly option.
✅ Appearance: Provides a seamless appearance that blends perfectly with the entire roof.
Cons:
❗ Durability: Higher wear due to water flow concentration in the valley area, which can lead to faster deterioration.
❗ Maintenance: More frequent inspections are required to detect missing shingles, debris accumulation, and potential leaks.
Climate Consideration:
In Winnipeg’s cold climate, closed valleys are more prone to ice dams, which can cause water infiltration and lead to roof leaks if not properly managed.
Comparison: Open vs. Closed Valley Roofs
When comparing open valley roofs and closed valley roofs, it’s essential to consider the following factors:
1. Cost
- Open Valley Roof: Higher initial investment due to the cost of metal flashing and installation.
- Closed Valley Roof: More cost-effective upfront, but may require more frequent maintenance, leading to higher long-term costs.
2. Durability
- Open Valley Roof: Metal flashing offers greater durability and longevity.
- Closed Valley Roof: Shingles in the valley area wear down faster, especially under heavy rain and snow.
3. Maintenance
- Open Valley Roof: Easier to inspect and repair due to the exposed metal valley.
- Closed Valley Roof: Requires more frequent inspections to identify leaks and damage from water infiltration.
4. Aesthetics
- Open Valley Roof: Exposed metal provides a more industrial or utilitarian look.
- Closed Valley Roof: A seamless appearance blends with the entire roof, enhancing the home’s aesthetic qualities.
Choosing the Right Option for Winnipeg Homes
When deciding between an open valley roof and a closed valley roof, consider these key factors:
🏡 Climate: In Winnipeg’s climate, where heavy snow and ice dams are common, an open valley roof provides better protection by promoting efficient water flow and minimizing ice buildup.
💰 Budget: If you’re looking for a cost-effective solution with lower initial costs, a closed valley roof might be a suitable choice. However, keep in mind the potential for higher maintenance and repair costs over time.
🎨 Aesthetic Preference: For homeowners who prioritize a seamless appearance that complements the overall design of the roof, a closed valley system may be the preferred option.
Above All’s Expert Pro Tip:
The Insulation Manager at Above All recommends open metal valleys for Winnipeg homes due to their superior durability, water management, and ability to handle harsh weather conditions.
For personalized advice and a professional roof inspection, contact us today!
Both open valley roofs and closed valley roofs have their advantages and challenges. Open valleys offer superior durability, better water management, and easier maintenance, while closed valleys provide a more seamless and cost-effective solution.
For homeowners in Winnipeg, considering factors like climate, various roofing materials, budget, and aesthetics is key to making the best decision. If you’re unsure which roof valley type is right for your home, reach out to a roofing contractor like us for expert advice and assistance with your roofing needs and roof installation.
📞 Contact us today for a professional roof inspection and explore the best roofing solutions for your home.